本文選題：斜立液壓缸 + 直驅式容積控制��； 參考：《哈爾濱工業(yè)大學》2011年碩士論文

【摘要】：斜立液壓缸在航空航天、工程機械等領域廣泛應用,它一般具有以下特點:沿液壓缸方向有連續(xù)變化的重力分量;重力分量變化范圍大。直驅式電液伺服系統(tǒng)具有交流伺服電動機控制的靈活性和液壓大出力的雙重優(yōu)點,已在多個領域的裝置上獲得應用并取得較大的經(jīng)濟效益。 論文正是針對斜立液壓缸的特點,研究一種對斜立液壓缸普遍適用的直驅式電液伺服系統(tǒng),該驅動系統(tǒng)通過蓄能器壓力的設定動態(tài)平衡變化的外力,并在液壓缸縮回時進行能量回收,節(jié)能效果明顯;系統(tǒng)使用雙聯(lián)泵控制非對稱缸,雙聯(lián)泵排量比與非對稱缸兩腔有效面積比嚴格匹配,使泵控非對稱缸正反向運動特性相似,改善了控制性能;液壓蓄能器的使用,使雙聯(lián)泵進出口始終保持高壓,使系統(tǒng)補油迅速,提高了系統(tǒng)的響應速度和頻寬。 在大量閱讀國內外文獻大量閱讀之后,首先比較了直驅式容積控制系統(tǒng)與傳統(tǒng)液壓控制系統(tǒng)的特點,綜述了國內外對直驅式電液伺服技術的研究現(xiàn)狀。 其次分析了直驅式電液伺服系統(tǒng)原理,簡述了被選定為研究對象的斗輪堆取料機的概況,并對斗輪堆取料機三種工況下俯仰缸進行受力分析;設計了直驅式液壓系統(tǒng),并完成了液壓回路的分析計算;將系統(tǒng)主要部件集成在閥塊中,簡化系統(tǒng)結構;將集成閥塊、齒輪泵、蓄能器、油箱及聯(lián)軸器、管路等集合成液壓包。 最后分別建立了交流伺服電機和泵控缸機構的數(shù)學模型,綜合建立系統(tǒng)開環(huán)和閉環(huán)模型,討論了可變參數(shù)對系統(tǒng)的影響,并通過仿真與實驗中系統(tǒng)的頻率特性曲線分析系統(tǒng)的穩(wěn)定性、精度和快速性。
[Abstract]:The inclined vertical hydraulic cylinder is widely used in aerospace, engineering machinery and other fields. It generally has the following characteristics: the gravity component along the direction of the hydraulic cylinder has a continuous change of gravity; the variation range of the gravity component is large. The direct drive electro-hydraulic servo system has the dual advantages of the flexibility of AC servo motor control and the large hydraulic force, and it has been in many fields. The device has been applied and achieved great economic benefits.
Aiming at the characteristics of the inclined vertical hydraulic cylinder, this paper studies a kind of direct drive electro-hydraulic servo system which is generally applicable to the inclined vertical hydraulic cylinder. The drive system can dynamically balance the external force by setting the accumulator pressure, and reclaim energy when the hydraulic cylinder is retracted, and the energy saving effect is obvious. The system uses double pump to control asymmetric cylinder and double connection. The pump displacement is strictly matched with the two cavity effective area ratio of the asymmetric cylinder, which makes the pump controlled asymmetric cylinder's positive and reverse motion characteristics similar, and improves the control performance. The use of the hydraulic accumulator makes the inlet and outlet of the double pump keep high, make the system fill the oil quickly, and improve the response speed and the frequency width of the system.
After reading a large amount of reading at home and abroad, the characteristics of the direct drive volume control system and the traditional hydraulic control system are compared, and the research status of the direct drive electro-hydraulic servo technology at home and abroad is reviewed.
Secondly, the principle of the direct drive electro-hydraulic servo system is analyzed, the general situation of the bucket wheel stacker reclaimer selected as the research object is briefly described, and the force analysis of the pitching cylinder is carried out under the three operating conditions of the bucket wheel stacker reclaimer; the direct drive hydraulic system is designed and the analysis calculation of the hydraulic circuit is completed; the main components of the system are integrated into the valve block and simplified. System structure; integrated valve block, gear pump, accumulator, fuel tank and coupling, pipeline and so on to assemble hydraulic package.
At last, the mathematical model of AC servo motor and pump control cylinder is set up respectively. The open loop and closed loop model of the system is established. The influence of variable parameters on the system is discussed. The stability, accuracy and rapidity of the system are analyzed by the frequency characteristic curve of the system in the simulation and experiment.

【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH137

【參考文獻】

相關期刊論文 前10條

1 紀友哲;祁曉野;裘麗華;王占林;;泵閥聯(lián)合EHA效率設計仿真分析[J];北京航空航天大學學報;2008年07期

2 張靜月;斗輪堆取料機總體方案參數(shù)化設計系統(tǒng)研究[J];阜新礦業(yè)學院學報(自然科學版);1997年03期

3 史清錄,彭瑞棠;斗輪挖掘機鏟斗偏角和傾角變化規(guī)律的分析[J];工程機械;1997年12期

4 車兆學，，李安文;輪斗挖掘機工作面作業(yè)參數(shù)與生產能力之關系[J];化工礦山技術;1994年06期

5 羅勇武,黎勉,查曉春,李定華;交流變頻容積調速回路的分析與研究[J];機床與液壓;1997年05期

6 高欽和,黃先祥;基于Simulink的重物舉升液壓控制系統(tǒng)建模與仿真[J];機床與液壓;2001年01期

7 徐步力,付永領;一種新型電液作動系統(tǒng)[J];機床與液壓;2002年05期

8 吳時飛;胡軍科;何國華;張保松;;功率反饋式閉式液壓泵、液壓馬達系統(tǒng)研究[J];機床與液壓;2007年02期

9 陶又同;;蓄能器的狀態(tài)動特性及熱損失[J];武漢水運工程學院學報;1985年01期

10 史清錄,彭端棠,章嘉林;斗輪挖掘機斗齒的運動分析[J];太原重型機械學院學報;1998年04期

相關博士學位論文 前1條

1 蘇文海;直驅式電液伺服轉葉舵機關鍵技術及其控制系統(tǒng)研究[D];哈爾濱工業(yè)大學;2009年

相關碩士學位論文 前7條

1 吳亞坤;新型直驅式電液伺服飛行模擬器單通道驅動裝置研究[D];哈爾濱工業(yè)大學;2010年

2 趙琦;蓄能器及其工作回路的計算機輔助設計[D];燕山大學;2001年

3 權凌霄;基于管路效應的皮囊式蓄能器數(shù)學模型與實驗研究[D];燕山大學;2005年

4 宋孝臣;入口特性對蓄能器性能影響的研究[D];燕山大學;2006年

5 杜明明;變風量空調系統(tǒng)的Simulink建模與仿真研究[D];哈爾濱工業(yè)大學;2006年

6 耿華;斗輪堆取料機工作裝置動態(tài)特性研究[D];吉林大學;2007年

7 呂杰;直驅式電液伺服系統(tǒng)的設計與特性研究[D];哈爾濱工業(yè)大學;2008年

本文編號：1852537